-Vanity Fair wrote some stuff about how it's 2004 all over again because there's an asshole president elect and Green Day is protesting.
-The chant at the AMAs was inspired by punk legends MDC and their 1982 anti-fa song "Born to Die." The chant went "no war, no KKK, no fascist USA." MDC approves of Green Day borrowing from them. Rolling Stone has an article about it.
-Billie Joe semi-joked that an album about Trump would be called The Day After. “But I think the A.M.A.s, with us, it was a good start to challenge [Trump] on all of his ignorant policies and his racism.”
Source is a small Vanity Fair piece.